Smut-mill



C. FRANK.

Srnut Miil.

Patented Jan y- 25,1859,

UhlTTlElE %TATE% PATENT @FTTQE.

CARL FRANK, OF CLEVELAND, OHIO.

SMUT-MILL.

Specification of Letters Patent No. 22,720, dated January 25, 1859.

To all whom it may concern."

Be it known that I, CARL FRANK, of Cleveland, in the county of Cuyahoga, in the State of Ohio, have invented a new and useful Improvement in Smut-Mills; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

Holding in View one of the fundamental principles of mechanics to wit: that every mechanical operation requires a certain time for its proper performance; I found that the passage of the grain through the usual smutmills is too rapid and I conceived the idea of combining with a smut mill of the construction hereafter to be described, an apparatus for feeding the grain to the smut cylinder and removing it therefrom atcertain intervals with mathematical precision, in order to let the grain be operated upon just as long as required (according to practical experience) for the proper performance of the operation.

If the grain passes too rapidly through the smut-mill, it will not be thoroughly cleaned and the flour will have that lead colored appearance peculiar to inferior qualities of flour.

If the grain passes too slowly through the smutanill the grain itself will be affected in the smut-mill and the yield of flour of a certain quantity of grain will be less than what it ought to be.

In my machine the grain is first fed to the sieve a which lets the grain pass through its meshes and thereby separates it from the coarse dirt, stones, etc., which latter passes over the inclined sieve 64 out of the machine.

The grain falls through sieve a upon sieve 7) which is inclined in a direction opposite to the inclination of sieve a. The meshes of sieve b are such that the smaller particles of dirt and other impurities will pass through the sieve and falling upon the inclined board a will pass out of the machine through spout 6, while the grain rolling down the sieve b finds it way through slot 0 into a trough c. This trough has in its bottom a longitudinal slot d which allows the grain to pass through and into the hollow revolving cylinder (Z as often as the slot 6 in the cylinder (Z comes to correspond with the slot (Z in the bottom of the trough. The cylinder (Z revolves within a hollow cylinder 6 which latter has a slot on top to correspond with slot (Z and has also a slot- Z at its bottom. As soon as the slot 6 during the revolution of cylinder (Z, has arrived over the slot Z, the grain will pass out of cylinder (Z through slots 6, Z, upon the smut cylinder 7Y3 and will here be operated upon between the roughened surfaces of the cylinder 76 and of the inclosing cylinder or tuben. This tube or is provided with numerous holes all over its surface, and is surrounded by another tube 0. The space 0 between the two tubes commu nicates with ventilator m by which means the dust created by the operation of the smut cylinder, is drawn through the holes in the tubular surface 72- into space 0 and blown out through spout 7). The cylinders (Z and 7 are geared togetherby means of cogwheels 2', 71, tooth g, and ratchet wheel f so as to feed the grain to the smut cylinder at proper intervals; The cylinder (Z is connected with a shaft t below the smut cylinder, by means of band and pulleys f, g, h, in such a way that the shaft 17 will make a revolution in the same time that cylinder 01 makes one. The shaft t carries two disks t each of them being provided with an indentation s, the two indentations corresponding with each other. At the bottom of tube at and extending its whole length there is a hinged door 9 provided with two pins 1 which rest upon the surface of disks t. As long as the pins 1" rest upon the circular surface of the disks, the door will'be kept closed, but as soon as the indentations s arrive underneath the pins 1" the door Q will be allowed to drop (see position in red in Fig. 2) and the grain. will pass from between the smut cylinder and the tube 41 into trough o. The slide 10 is to be opened sufficiently to let the grain pass slowly over the inclined bottom '1; onto sieve 0a. Dust and screenings not yet removed pass through the sieve f0 and are carried out of the machine by means of an endless screw z. The grain after having passed over sieve 00 enters the ventilator spout y to go through the last cleaning or separating process. The lever A, B, worked by eccentric E serves to vibrate the sieves b and :0.

My machine as above described can easily be made suitable for barley, rice and other material by changing the gearing, so as to allow the material to be operated upon l 0161' (Z, revolving Within another hollow cylcluring a sulfieiently long time. inder e, as above described.

What I claim as my invention and desire to secure by Letters Patent is: CARL ANK. [1,. s.] I 5 Arranging between the trough a, con- Witnesses:

mining the grain to be scoured, and the H. ANHZiUSSER, scouring cylinder is, a slotted hollow eylin- E. I'IESSENMUELLE. 

